For one, science doesn't really bode well for "free will". Free will presupposes a soul or some way for non-determinism to enter into the world.
Second, this "free will" choice is either random (so could go either way), or determined on some previous shaping of your character. In other words on a morality (didn't have to happen through specifical moral education, e.g. church lessons, could just be through example by your parent behavior etc. But it's still a morality).
Yes. Because I have free will and chose to. In my experience, one's religious beliefs have no bearing on whether they act morally or not.